- #MICROSOFT ACCESS 2013 TUTORIAL 3 CASE PROBLEM 4 ARCHIVE#
- #MICROSOFT ACCESS 2013 TUTORIAL 3 CASE PROBLEM 4 DOWNLOAD#
* directory is deleted once the operator finishes executing. Step 5: Click ‘Next’ for the popped-up question that asks about the column headings. Step 4: Browse to select the excel file and accept the default values. Step 3: In the Microsoft Access application, select external data > Excel. * from the operator is automatically passed back to the calling context. Step 2: Then, select the range of data in the excel file. * I create a temp directory and pass it to the given operator.
#MICROSOFT ACCESS 2013 TUTORIAL 3 CASE PROBLEM 4 DOWNLOAD#
The following images failed to download - re-uploading the images may SuccessCount = countWithProperty( results, "success", true ) ĮrrorCount = countWithProperty( results, "success", false ) Modify the "happy path" result to represent the "sad path". "happy path" result that can be returned AS IS or, updated in theįileCopy( imageUrl, "#tempDirectory#/#result.imageFilename#" ) For this type of "results-based" approach, I like to set up a way, we can create a "result" for each parallel image download operation server errors, etc), we're going to use a MAP instead of an EACH. Since we know that some downloads may fail (bad files, network errors, "" // This will fail (invalid domain name).
"", // This will fail (invalid domain name). Let's download these images in parallel. To demonstrate some sad path operations, I have purposefully put two invalid URLs in the target Array: Typically, I like to create a Happy Path result object that gets returned if all goes well and then, modify that result to represent the Sad Path in the case of an error. map() operator is responsible for downloading a single image URL and returning the result of the download. map() on a given collection of image URLs. When using this approach, I'm going to invoke a parallel. That's the pattern that I want to demonstrate in this post.
#MICROSOFT ACCESS 2013 TUTORIAL 3 CASE PROBLEM 4 ARCHIVE#
But, at least in some cases, I've opted to go with the latter approach: generating the ZIP archive and then letting the user know that some of the images failed. I don't think there's a one-size-fits-all solution. Do we want the overall ZIP generation to fail due to a single missing image? Or, do we want to generate the ZIP and then let the user know that some of the images failed to download? It's hard to know what the best user-experience (UX) for this is. And, even if they do exist, the download of the image object itself can fail for a variety of reasons.
The problem is, those remote images don't always exist. Since I've found this to be a very helpful pattern, I wanted to put together a small demo in Lucee CFML 5.3.7.47.Īt InVision, we generate a lot of ZIP files that consist of remote images. My current approach for this is to map the collection in parallel, generating a "result" value for each operation. That said, we do have to care about errors especially since an error won't halt the parallel iteration. Except, we don't have to care about the threading - Lucee just handles it for us. This feature allows us to call map, filter, each, any, and some using low-level threading. Hands-down, one of the most bad-ass features of Lucee CFML is parallel iteration over collections.